Do high school grades predict college success better than test scores?
Core argument: In a study of 2010–2019 cohorts at a large public urban university system, high school GPA predicts student academic success far better than the SAT, contrary to analyses of Ivy-plus colleges that found the SAT superior.
Many of the country’s most selective colleges have returned to requiring the SAT, based on evidence that the test not only predicts student success, but facilitates the identification of qualified applicants from disadvantaged backgrounds. The results from our study of a large public urban university system find the opposite: high school grades are a vastly superior predictor of student academic success than is the SAT. We undertake an exercise with binned scatter plots of six year graduation rates against HSGPA [High School Grade Point Average] stratified by URM [under-represented minority] and whether the student received the maximum Pell grant (Figures 1a and 1b). [Note that SAT is included in the regression so the monotonic linear effect of GDP remains after controlling for SAT score]. We find that URM are less likely to graduate in six years at every level of HSGPA than are non-URM. In contrast, we find no similar difference when we stratify the plot by whether the student received the max Pell grant or not, a strong proxy for a low-income household (Figure 1b). The clear takeaway from the analysis of the 2010-2019 cohorts is the dominance of HSGPA in predicting student academic success. The results are in direct contrast to recent high-profile analyses of students from Ivy-plus colleges that demonstrated the superiority of SAT over HSGPA in predicting not only first-year academic outcomes, but post-college success as well.




